The Osprey Atmos AG 65 outperforms for serious backpacking with its 65 L capacity and Anti-Gravity suspension per Outside magazine reviews while the Patagonia Black Hole Pack 25L excels in portability at 1.5 lbs. The 25 L model compresses easily for travel but lacks capacity for overnight loads unlike the Osprey. Direct comparison favors the Osprey for hiking performance but Patagonia for every...